21c/L (12c variable, 9c fixed) or a break-even milk price of 2.62/
kg milk solids (MS) [Table 4]). Financial success is predicated on
high output per cow and per ha and good herd fertility.
early days for results. Systems research requires several years
for concrete conclusions as this overcomes a specific `year'
e ect on the results.
Cows are milk-recorded twice monthly and these results are
compared with the daily yields from the milking parlour. Table
5 below shows the milk recording for 2016. Due to the small
numbers of cows in the high and low PTA groups, overall
results for the group are shown.
breeding was by artificial insemination (AI) and the list of bulls
used is shown in Table 7 below.
The 2016 reproductive performance is shown in Table 8.
Submission rate was high at 91 per cent, however, conception
per cent, the six-week calving rate for 2017 will be lower than
Five cows were not pregnant when they were scanned in
early September resulting in an empty rate of 9 per cent.
Replacement rate will be maintained at 23 per cent to ensure
empty cows are replaced, allow for some voluntary culling and
maintain a high level of genetic progress.
year period. In the first year, milk production has come to within
5 per cent of expectations. In future years, it will be interesting
to see if grass growth can be increased and if acceptable
levels of fertility can be achieved to ensure the sustainability of
such as system.
Professor Finbar Mulligan, Dr Karina Pierce, Dr Bridget Lynch,
Luke O'Grady BVMS, Professor Alan Fahey, Dr Michael Wallace,
Dr Jenny Davis, and the farm sta at Lyons, especially dairy
manager, Michael Clarke, and the farm manager, Dr Eddie Jordan.